attached are updaters copies of the files from the errors that should fix them.
locate the users configuration folder, for details see this page:
http://www.webassist.com/tutorials/Common-installation-issues
then copy the attached:
WA_unInstall2.htm
WA_unInstall.htm
into the Configuration/Commands folder
and the attached:
WA_Installer2.html
WA_Installer.html
into the Configuration/Floaters folder.